Fixed calculating CRC32 on 64bit platforms

When compiling on a 64bit machine we should make sure that we won't overflow
the 32bit CRC value because of casting signed int to unsigned long.

Reviewed-by: Thiago

1 files changed, 2 insertions, 2 deletions

diff --git a/config.tests/mac/crc/main.cpp b/config.tests/mac/crc/main.cpp
index 894f88b0df..700a4cd2b0 100644
--- a/config.tests/mac/crc/main.cpp
+++ b/config.tests/mac/crc/main.cpp
@@ -71,7 +71,7 @@ private:
         for(int iCodes = 0; iCodes <= 0xFF; iCodes++) {
             ulTable[iCodes] = Reflect(iCodes, 8) << 24;
             for(int iPos = 0; iPos < 8; iPos++) {
-                ulTable[iCodes] = (ulTable[iCodes] << 1)
+                ulTable[iCodes] = ((ulTable[iCodes] << 1) & 0xffffffff)
                     ^ ((ulTable[iCodes] & (1 << 31)) ? ulPolynomial : 0);
             }
 
@@ -84,7 +84,7 @@ private:
         // Swap bit 0 for bit 7, bit 1 For bit 6, etc....
         for(int iPos = 1; iPos < (cChar + 1); iPos++) {
             if(ulReflect & 1) {
-                ulValue |= (1 << (cChar - iPos));
+                ulValue |= (1ul << (cChar - iPos));
             }
             ulReflect >>= 1;
         }